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- Engage your students with these week-long STEM Physical Science challenges. The STEM bundle comes with 11 student-led STEM activities.What's Included in Each STEM Project• The 21st-century problem includes a video challenge which outlines the activity in a fun and easy to understand way.• The slide$119.00$143.00Save $24.00
Engage your students with this week-long STEM challenge.
As a forensic scientist, one of your jobs is determining the chemistry of unknown substances. The authorities have given you three powders that were all found at the scene of a recent break-in at a major research facility. They suspect industrial espionage might be to blame. Using your forensic skills, you have been asked to identify the three samples.
A series of tests need to be performed on each of the samples. These will include:
• Identifying the crystal shape using a hand lens
• Observing the color
• Determining the solubility
• Testing the pH
• Reactivity to hydrochloric acid
• Color change using iodine
All tests need to be completed on each of the samples. After finishing the assignment, write a final report to the lab director stating your analysis.
The research facility is counting on your skills to provide the correct information, so justice can be served.
• The 21st-century problem includes a video challenge which outlines the activity in a fun and easy to understand way.
• The slideshow presentation (PPT) allows the teacher to facilitate the pacing throughout the project.
• The teacher lesson plans include TEKS and NGSS standards alignment, and step-by-step directions on what the teacher and students should be doing along the way.
• The student notebook will guide the student through the activity. The questions will challenge students to learn new information, reflect on learned information, and provide the students a framework for the entire project.
• Each lesson is written using the Launch process. Students are going to be brainstorming with their peers and reflecting on failures and opportunities. At the end of each project, we’ve asked the students to share their ideas with the world. This holds students accountable. They will put forth the best effort knowing other students could critique the project.
What Supplies Do I Need
Each product contains a list of suggested supplies for the project. We were very cautious about choosing inexpensive items. This project has a suggested supply list that includes:
· Choose from the white powders listed on slide 33 of the PP (Alka Selzer, baking soda, borax, calcium carbonate, corn starch, cream of tartar, flour, gelatin, gypsum, sodium acetate, table salt, table sugar, vitamin C, or yeast)
· Hand lens
· Black paper
· Test tube with stopper
· 5mL water
· Graduated cylinder
· pH or litmus paper
· Weak hydrochloric acid (can substitute vinegar)
The supply list is dynamic and can be adjusted to your situation.
NGSS and TEKS Standards
Supports Next Generation Science Standards:
Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
Evaluate competing design solutions using a systematic process to determine how well they meet the criteria and constraints of the problem.
Analyze data from tests to determine similarities and differences among several design solutions to identify the best characteristics of each that can be combined into a new solution to better meet the criteria for success.
Develop a model to generate data for iterative testing and modification of a proposed object, tool, or process such that an optimal design can be achieved.
TEKS Science 8.5 E - investigate how evidence of chemical reactions indicate that new substances with different properties are formed.
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